# Walkie-Talkie circuit ## Description A simple walkie-talkie circuit running off an Arduino Nano. Utilizes a BJT to amplify the microphone voltage and transmits the radio signal through a nRF24L01 series Transceiver. ## Project Details - **Owner:** michaelkd - **Created:** 10/25/2023 - **Last Updated:** 3/30/2024 - **Visibility:** Public - **Stars:** 1 - **Forks:** 1 - **Copies:** 1 ## Key Components ### J1 — [2-Position Screw Terminal](https://www.flux.ai/corynrobinson/2-position-screw-terminal~s4.md) - Datasheet URL: https://www.we-online.com/katalog/datasheet/691137710002.pdf - Part Type: Connector - Manufacturer Part Number: 691137710002 - Manufacturer Name: Würth Elektrik **Pins:** - P1 [pin 1] - P2 [pin 2] ### MK1 — [CMA-4544PF-W_Microphone Symbol](https://www.flux.ai/adrian95/cma-4544pf-wmicrophone-symbol~kbd.md) - Manufacturer Name: CUI Devices - Part Type: Microphone - Manufacturer Part Number: CMA-4544PF-W - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.cuidevices.com/product/resource/cma-4544pf-w.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] ### Q2 — [2N3904 Inline](https://www.flux.ai/adrian95/2n3904~a6d.md) - Manufacturer Name: NTE Electronics, Inc - Part Type: Transistor - Datasheet URL: https://www.nteinc.com/specs/original/2N3904.pdf - Manufacturer Part Number: 2N3904 **Pins:** - B - C - E ### SPK1 — [3W Speaker Horn 4R](https://www.flux.ai/jharwinbarrozo/3w-speaker-horn-4r~af3.md) - 3D source: https://grabcad.com/library/3-watt-4-ohm-mini-speaker-1 **Pins:** - NEGATIVE - POSITIVE ### SW1 — [Push Button](https://www.flux.ai/jharwinbarrozo/push-button~eqk.md) - Manufacturer Part Number: B3FS-1050P - Manufacturer Name: OMRON - Datasheet URL: https://datasheet.lcsc.com/lcsc/1809271215_Omron-Electronics-B3FS-1050P_C231326.pdf - Part Type: Switch **Pins:** - P1 [pin 1] - P2 [pin 3] ### U1 — [NRF24L01](https://www.flux.ai/vasyl/nrf24l01~gmk.md) - Manufacturer Name: Texas Instruments - Part Type: Module - Datasheet URL: https://www.snapeda.com/parts/NRF24L01P-MODULE-PCB/Nordic%20Semiconductor/datasheet/ - Manufacturer Part Number: NRF24L01 **Pins:** - ~CSN [pin 4] - ~IRQ [pin 8] - CE [pin 3] - GND [pin 1] - MISO [pin 7] - MOSI [pin 6] - SCK [pin 5] - VDD [pin 2] ### U2 — [LM7805CT/NOPB](https://www.flux.ai/adrian95/lm7805ctnopb~wo3.md) - Manufacturer Name: Texas Instruments - Datasheet URL: https://www.ti.com/lit/ds/symlink/lm340.pdf - Manufacturer Part Number: LM7805CT/NOPB - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - GND [pin 2] - VI [pin 1] - VO [pin 3] ### U3 — [ARDUINO_NANO](https://www.flux.ai/jecstronic/arduinonano~2x.md) - Datasheet URL: https://www.snapeda.com/parts/Arduino%20Nano/Arduino/datasheet/ - Manufacturer Name: Texas Instruments Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: ARDUINO_NANO - Part Type: Integrated Circuit **Pins:** - +5V [pin 27] - 3V3 [pin 17] - A0 [pin 19] - A1 [pin 20] - A2 [pin 21] - A3 [pin 22] - A4 [pin 23] - A5 [pin 24] - A6 [pin 25] - A7 [pin 26] - AREF [pin 18] - COM/GND [pin 4] - COM/GND [pin 29] - D0/RX [pin 2] - D1/TX [pin 1] - D10 [pin 13] - D11/MOSI [pin 14] - D12/MISO [pin 15] - D13/SCK [pin 16] - D2 [pin 5] - D3 [pin 6] - D4 [pin 7] - D5 [pin 8] - D6 [pin 9] - D7 [pin 10] - D8 [pin 11] - D9 [pin 12] - RESET [pin 3] - RESET [pin 28] - VIN [pin 30] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/michaelkd/walkie-talkie-circuit~ze](https://www.flux.ai/michaelkd/walkie-talkie-circuit~ze).* --- *Generated from [https://www.flux.ai/michaelkd/walkie-talkie-circuit~ze](https://www.flux.ai/michaelkd/walkie-talkie-circuit~ze)*